Tensioning device.



W. R..DEN|VH\N.

TENSIONING DEVICE. APPLICATION mtu 001.6. m5.'

Patented Jim@ 20, 1916.v

5 SHEETS-SHEET l.

R. DENMAN, T ENSIONING DEVICE. APPLIQATION FILED 0CT.'6. 1915.

Patenwd l1(1111920, 1916.

5 SHEETS-SHEET 2.

TENSIONING ivlci.

APPLICATION FILED OCT. 6.1915.

Patented June 20, 1916.

5 SHEETS-SHEET 3.

W. R. DENIVIAN.

TENSION'ING DEVICE. y APPLICATION P ILED ocT. s'. 1915'.

5 SHEETS-SHEET 4.

Patented J une 20, 1916.

w.l R. D ENMAN.

TENSIONING DEVICE.v

APPLICAT'IO'N FILED OCT. 6, 19'15.v

Patented June 20; 1916.

5 SHEETS-SHEET 5.

fiwwwan arremete.

. TENSIONlfNG DEVJECE.

To all whom t may concern:

a citizen of 'the United States,v residing at Akron, in the county of Summit and Stage of @hid have-invented' certain new and usewhich the' following is a spcification.

' .The present-invention relates to tensioning devices and pertains more. particularly to those forms fof tensioning devices which are' adapted to be used in feeding a plurality of cords or strands of .thread to a twisting machine. x

The present invention has for its object to providea form` of tensioning device of the kindy above referred to which will be simple in construction and Aat the-same time extremely sensitive in its operation.

Further objects of the invention consists in providing certain improvements and refinements in apparatus of the particular `kind which will enlarge its use and increaseits efficiency.

Wlitli these and other objects in view, the

invention consists in the combination and arrangement of parts more fully described in the followingspecification, illustratedfin the accompanying drawings,l and pointed out inthe appendedclaims.

tion of one embodiment of the present invention. Fig. 2 is a rear elevation of same. Fig. 3 is a detail of one of the spool retaining devices. Fig. 4 is a planview, and Fig. 5 is a side elevation of one of the pivoted bracket arms. Fig. 6 is a plan view.` Fig.

" 7 isa front elevation, and Fig. 8 is an end j view' of one of the vertically adjustable brackets.. Fig. 9 is afragmentary detail of oneof the upper guide pulleys with its supporting structure. Fig. 101s an elevational view ofone of the friction driving disks i with the spool removed. .Fig.' 11 is a sectionalfview of one ofthe driving disks with its spool attached. Figs.V 12 and 13 are de-` tails. Fig. lll-isv a plan view of one of the upperl brackets. `Fig. 15 is a detail.

Referring now to the drawings, the apparatus comprises a frame having a horizontally disposed base 1, a vertical upright 2 rigidly securedv thereto and an inclined` channel plate 3 extending from the top of i the upright 2 to the base 1 The triangular frame thus formed serves to support the spools and .various tension devices which are llll'iftllTFaf't MENMN, OF AKRN, Dl-110, -ASSGNBJ TU MJLLLER RUBBER 4130 F @Hllt CORPORATION" 0F OHIO.

lto the twisting machine. ful lImprovements in `Tensioning Devices, of

.means are duplicated for 1n the drawings: Figure 1 is a sideeleva-l J-llllli f fana,

serial no. tri-,37s.

Specification of `Letters lPatent. Pwbmytrgrlj Jun@ Zttia jjgjtt, .application ied october e, 1915.

carried on brackets suitably arranged along the inclined plate 3.

The apparatus may be provided-with any number of spools from which thread isfed In the present form however, a device is shown adapted 'to 'carry eight spools, arranged for convenience with four on either side of the central frame plate 3. The supporting mecha-A` nism, tension devices 'and thread guiding each spool or pair ofv spools, hence the construction and arrangement of only one pair will be described in' detail.

A plurality yof fixed bracket platest are secured at intervals to the outer face of the channel plate 3. Each of these brackets l comprises a portion 4a secured by bolts 5 to the channel plate 3 and provided near its upper end with a bearing 6. At the lower endv of the plateaa an integral plate 4b is formed, extending horizontally to form a rigid support for other parts of the mechanism as will behereinafter described. The horizontal extension 4b is in the shape of a cross having a pair ofarms 4c extending therefrom on either side.- A vertical rod iis supported at the outer central extremity of the cross-shaped bracket piece 4b, having its lower end threaded and bolted into a suitable opening 8, pro -:'.dedtherefon A horizontally disposed supporting frame 10 having a centralintegral sleeve or collar?) is vertically adjustable by `means of` a set screw 11v along the rod 7. By referring particularly to Figs. 6, 7 8 and 14 it will be seen that the main portion of the frame 10 is located at the rear side of the bushing 9 and extends parallel to the side arms 4c of the cross-shaped bracket piece 4e" above which [it is positioned. The frame 10 is provided with two pairs of upwardly extending split rings 11, each pair .of 'which forms end bear'- ings for one of the rods 12 adapted to be clamped therein by means'of nuts 13.

Forwardly` extending arms 15 are provided, oney on each of the rods 12. Thev arms 15 are clamped onto the rods 12 near their outer ends, by means-of split ring members 15a. At their forward ends, the

instable Y `bracket 4 has two vStringing arms 2 5 hinged provided, one for each of the rods l2, rthey are secured in suitable position near the inner ends of the rods 12 in ar manner similar tothe split collars l5 of the arms 15, .Each of the fittings 2l is formed with a, laterally exte: ling socket 2l l'iaving; an interior screw threaded bore adapted to receive the inner ends of rearwardly projecting` rods 22; ly meansl of thesplit lcollar connections with the rods l2. both the arms l5 and the tittinr's 2l can be adjust-ed to any de sired position alonethe rods l2. anc. turned about rods l2..

The. spindles Q3 upon which-the thread spools or hobhins 2l are carried are supported in the ends'of arms 25, the oppositeends of which are pivotally mounted on pins 2o passing through thc hearings G at the upper ends of the brackets l. .The outer free ends of the swinging arms Q5 are each j'lrovided with transverse bores 2,7 having enlarged recesses QS at either side to form seats for hall bearings B. lj. The spindles Q3 are loosely journaled in the hores Q7 and are provided with two sets of screw threads 23 and 23h. respectively. The outer screw threads Q53 have caps or lock nuts Q9 threaded thereon.y while the inner threads-Q31J engage with interiorly threaded hores of friction disks 30 carried on the spindles 9.3 just inside the inner ends of the spools Q4,

'These' friction disks 30 are each provided with pins which mesh with circular holes in spools Q4. as isclearly shown in Fig. l0. T he spools 24 are placed on the spindles Q3 and retained in place by means of pivoted springoressed catches 3l. located at the outer spindle ends.

It will thus be seen that the spindles 23 are freely mounted with ball hearings to facilitate their rotation. while the spools 24 carried thereon have circular bolts to engage pins 24e. which in turn are threaded onto the spindles at 22a.

Each of the arms 4F of the cross-shaped bracket ends fl has permanently fastened to its opper surface a liber hlock 32 formed withi a curved recess 3Q inA its upper side conforming` in contour to the 'curvature of the outer circumference of the disk 30. Un,- der normal conditions the ,lower edge of the disk 30 rests on the block 32.

' The upper edge of each of the swinging arms Q5 is provided with a` series of small circular. screw-threaded holes 25a adapted to receive a small threaded pin 33 carried on the lower end of a coiled spring 34, which is attached to a depending rod the upper end of which is carried in a sliding clip 36 adapted to be adjusted' at` different positions along the rod 22 by means of a set screw 37.

Each bracket 4. supports at its outer lower end one vertical rod 7 with its several addevices carried thereon. Each Lise/,ers

to its upper end, and each swinging arin i??? carries one thread spool or spindl 2l.

As previously .stated a machine, may lie equipped with any number ot thread spindies and correslfiondin;l` thread `guidingand tensioningdevices by merely duplicatingrtln scheine and arranjicment here shown and described in connection with eight spools,

1from the spools 2t the threads pass upwardly over the .fluide pulleys itl. thence to Aguide pulleys 23S and` on to the twisting' Inachine wl crc the thread is to be twisted.

To illustrate clearly the various functions of the dillcrent parts let it be assumed that any particular thread is given a lsudden jerk or pull at, X, rthis will exert au upA ward puli on they cord between the Ispool )Yl and guide pulley 2o which lifts thc friction disk CEO oli oll the block ft2 ou which it prc viously rested. due to the, upward swinging otl the arm 25 about its pivot. The` spool will then bc absolutely free to rotate and the tension will he thus relic-wed, ssumin;r a more gentle. jerk is j fiven the cord at X the spool 2l aud disk 30 are not lifted from the block Si), hut a tension is exerted on the arm l5 and through the rod 22 a. slight tension is placed on the vertical rod 35. which acts through the coiled spring" ttlto the pivoted arm :2.7 carrying the spool 2l and disk 5 rllhe friction between tho disk 30 and block 3Q is consequently reduced and the extra tension caused by the gentle, jerk is relieved. The pull upward at the point Y caused by the sudden jerk on the thread ,k as previously stated would tend to lift the disk 30 from the block 3Q. at the same time, however a downward pull would be exerted on the forward end of the arm l5, which acting" through the rearwardly extending` rod 22 and dependingY rod and spring 34 would also tend to lift the. disk 30. Thus a double action 'is exerted to relieve the friction between the disk 30 and block 82, making` the apparatus vcry ellccs tive and sensitive' as a tensioning device.

Adjustments can. be easily made in all the various parts. Bracket 9 can he raised and lowered alone` the vertical rod 7: the sliding -clip 3G can he moved aloner the rod Q2 to vary the combined leverage of the arms l5 and rods 22. Pin oo can also be shifted along the various holes Q5 in the upper edge of the swinging' arms to change the lifting power of the coiled springl.

Having thus described my invention what claim is:

1. A tensioningdevice comprisingr a, thread carrying spool. an upwardly movable support therefor, friction means coacting with said spool underthe action. of gravity, Ia guide pulley supported in movable bearings and over which thethread passes. the pull upon the thread tending both to have a lifting effect on the spool. support and a, loweringelect on thefguide pulley, and connections. whereby the lowering of`the guide pul-` ley tends `to eXert an additional lifting effect on the spool support.'

2L A tensioning device comprising a thread carrying spool, Aan upwardly movable support therefor,frictionfmeans coacting with said spool under the action of gravity, a guide pulley supported in movable bearingsI and overwhich the thread passes, the pull upon ,the thread tending both-to have a liftingjeect on the spool support and a lowery ing effect on the guid pulley, and resilient connections whereby the lowering of the guide pulley tends'toexert an additional lifting effect on-the spoolsupport.-

' 3. A tensioning device comprising a swing- Aing arm, a thread spool loosely carried thereon, a frictionv member against which saidv thread spool normallyfcontacts, a thread "guide'and means connecting'said thread guide with said swingin arm .'for raising the'latter off of the frictlon member to relieve the tension lon the thread spool. .l

: 4. Atensioning device comprisingathread spool, a pivoted supporting arm therefor, a

friction member normally incontact with said spool, a thread guide', means for adjustin'g the distance between said thread" guide and Asaidl thread spool and resilient said pivoted supporting arm.

5. -A tensioning device comprising a supporting arm pivoted at one end, a thread spool rotatably carried at the other end', a

.connections between said thread vguide and friction member upon which said spooll nor- .mally rests, a thread gulde remote'from'said spool, a resilient connection between said- Vthread guide and saidpivoted` arm and means for varying' the degree of'resilieney of Said'connection.- I

6. A tensioning' device comprising a movable armlpiyotedat oneend, a spindle rotatably journaled in the other end, a thread spool carried on said spindle, a disk member non-rtatably'c'arried on saidspindle, -cou` 7. A tensioning device comprising a fixed frame, a movable arm. pivoted thereto at.

one end, a rotatable spindle journaled in the opposite end of said arm, a diskmember non-rotatably carried on said spindle, means coupling said disl{ membeiand said spool,

a friction block supported from said frame upon which said disk member normally rests, a vertical' 'rod supported from' said frame, an adjustable sliding bracket carried on saidl rod, a thread guide supported from saidbracket, anda resihentcoupling between said thread guide and said pivoted arm.

8. Atensioning device comprising a mov- -able arm pivotally connected at oneend .and

normally disposed in a horizontal position, a thread spool rotatably carried at the .outer end of said arm, friction meansnormally supporting said threadvspool, a vertically adjustablebracketcarried above said thread spool, a pairof oppositelydisposed lever arms extending from 'said bracket, athread guidecarried by oneof said lever arms and 1 lan'adjustable'resilient coupling between the .other lever arm and said movable pivoted..

arm.

l' lIn testimony whereof I a'xmy signature in presence of two witnesses.

-wALfrER R. DENMAN; Witnesses: i

CuA. WOLF, R. D. BELDEN. 

